Do not be tempted to think that the following isn't true
:-).
> Sustainability is about maintaining for the long term (at
> least until
> a new ice age
Ice age cycles are about 100,000 years.
You get about 90,000 years of glaciation (defined as about
1000+ feet of ice above where most people reading this are
sitting now) followed by about a 10,000 year "interglacial"
period. Actual cycle lengths vary somewhat. But not too too
much. So ...
> Maybe I'm shooting high.
As the current interglacial has lasted about 12,000 years so
far, and is thus about 2,000 years beyond it's use by date
already, your sustainability efforts may well last until the
next ice age. Alas. Just as well we have Global Warming ...
:-)
Russell
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